Enabling photoshop openGL drawing

This feature available in photoshop CS4 and CS5. With openGL drawing, you can allocate the photoshop CPU usage to your GPU card so the CPU resource can be saved for other running program.
To activate it just follow this simple step.

Go to edit - preferences - performance then tick enable openGL drawing, just like below... :D

OK then restart your photoshop to apply changes.
If the option is greyed out, this means that your VGA card doesn't meet the minimum requirements for photoshop to perform openGL drawing.

Then, what's the benefit by using openGL drawing?
What I see when I enabled openGL drawing to my photoshop is a lower CPU usage when processing image. After that, it show some visual effect to image such as 3D image border, smooth zoom, and fancy effect when you use hand tool.
This changes the image processing work to look more fun and smooth.... :D

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